🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: comp.lang.postscript
Article #564

Important safety tip

#564
From: Amanda Walker
Date: Tue, 13 Jun 1989 13:07
44 lines
2100 bytes
It seems user defined fonts (FontType 3) are a little more magical than they
appear.  Consider the following piece of PostScript code:
--------------------------
8 dict begin
	/FontType 3 def
	/FontMatrix [.001 0 0 .001 0 0] def
	/FontBBox [0 0 1000 1000] def
	/BaseFont /Courier findfont [800 0 0 1000 0 0] makefont def
	/Encoding 256 array def
	StandardEncoding Encoding copy
	/String 1 string def
	/StrokeWidth 40 def
	/BuildChar {
		exch begin
		BaseFont setfont
		String exch 0 exch put
		String stringwidth
		StrokeWidth setlinewidth
		1 setlinecap
		newpath 0 0 moveto String false charpath pathbbox
		setcachedevice
		newpath 0 0 moveto String false charpath stroke
		end
	} def
	currentdict
end /Courier-Compressed exch definefont pop
--------------------------
This creates a font that is based on Courier, but is compressed by 80%
horizontally, and with the stroke weight beefed up a little.  Pretty
simple, right?  Intending to keep this font as small as possible, I
tried removing the definition for /Encoding, but definefont objected.
So, I tried "/Encoding [] def" instead, since I don't actually use the
encoding vector for anything.  "definefont" took it, but when
I tried to show some text with it, my LaserWriter sent back "Fatal System
Error at 0Xnnnnn" where nnnnn is a hexadecimal number I didn't write
down, and then promptly rebooted itself.

Is this a known bug in PostScript 38.0?

--
Amanda Walker <amanda@intercon.UUCP>
--
"Some of the worst mistakes in history have resulted from trying to apply
methods that work fine in one field to another where they don't." -James Hogan
Technical Details
Message-ID: <13-Jun-89.091841@192.41.214.2>
Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!intercon!amanda@intercon.UUCP

Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!intercon!amanda@intercon.UUCP
From: amanda@intercon.UUCP (Amanda Walker)
Newsgroups: comp.lang.postscript
Subject: Important safety tip
Keywords: Chernobyl fonts
Message-ID: <13-Jun-89.091841@192.41.214.2>
Date: 13 Jun 89 13:07:11 GMT
Sender: news@intercon.UUCP
Reply-To: amanda@intercon.UUCP (Amanda Walker)
Organization: InterCon Systems Corporation
Lines: 44